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Twist the RAS logic a bit to avoid branching.

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MFC After:	1 week
Approved by:	re (blanket)
This commit is contained in:
Olivier Houchard 2007-09-22 14:23:52 +00:00
parent 8e5b20fa9c
commit 75f66155bf
1 changed files with 9 additions and 12 deletions
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21
sys/arm/include/asmacros.h
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@ -116,18 +116,15 @@
ldr r5, =0xe0000004; /* Check if there's any RAS */ \
ldr r3, [r5]; \
cmp r3, #0; /* Is the update needed ? */ \
beq 1f; \
ldr lr, [r0, #16]; \
ldr r1, =0xe0000008; \
ldr r4, [r1]; /* Get the end of the RAS */ \
mov r2, #0; /* Reset the magic addresses */ \
str r2, [r5]; \
str r2, [r1]; \
cmp lr, r3; /* Were we in the RAS ? */ \
blt 1f; \
cmp lr, r4; \
strlt r3, [r0, #16]; /* Yes, update the pc */ \
1: \
ldrgt lr, [r0, #16]; \
ldrgt r1, =0xe0000008; \
ldrgt r4, [r1]; /* Get the end of the RAS */ \
movgt r2, #0; /* Reset the magic addresses */ \
strgt r2, [r5]; \
strgt r2, [r1]; \
cmpgt lr, r3; /* Were we in the RAS ? */ \
cmpgt r4, lr; \
strgt r3, [r0, #16]; /* Yes, update the pc */ \
mrs r0, spsr_all; /* Put the SPSR on the stack */ \
str r0, [sp, #-4]!